独柱墩简支梁桥抗震性能的振动台试验研究

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摘要近年来出现的独柱墩梁桥横向倾覆事故及震害引起了广泛关注，关于其横向稳定性的研究取得了丰硕成果。然而与横桥向相比，地震作用下纵桥向的安全性仍然是非常重要的研究课题。为此，作者按现行规范设计制作了一跨缩尺比例圆形截面独柱墩简支梁桥模型，以E1 Centro地震波为纵竖向输入地震动，进行了大比例尺整桥单台面振动台试验。通过观察试验现象，分析了结构加速度、位移响应、滞回特性及钢筋混凝土应变，研究了桥梁在不同等级加速度下的损伤状态及动力响应规律。结果表明：梁体纵向位移较大，易发生由纵向碰撞引起的落梁及损伤；固定等效水平力-位移滞回曲线规则，其墩顶位移较活动墩大，墩底所受的力远大于活动墩，在抗震设计中应尤为关注固定墩的构造设计。

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	邵长江1
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	漆启明1
	韦旺1
	胡晨旭1
	王猛1
	肖来川1
	肖正豪1

关键词 ：独柱墩梁桥, 振动台试验, 抗震设计, 试验现象, 地震响应, 滞回曲线, 应变分布

Abstract：Recently, lateral collapse and seismic disasters caught much attention.Many achievements on lateral stability sprung up in the last few years.However, the longitudinal seismic properties of a single-column bridge are still unsolved.Thus, a scaled model of a single-span reinforced concrete bridge was designed using the current code.El Centro earthquake wave was selected as longitudinal and vertical input ground motion.This model was tested by a single large shaking table.According to the experimental phenomenon, the acceleration, displacement, hysteretic performance and strain of concrete and steel were investigated.The damage status and dynamic response characteristics under different earthquake excitation were studied.The results show that: large longitudinal displace of pier is prone to leading to unseating or damage due to collision; the hysteretic curve of a fixed pier is more regular than that of a movable pier, the drift ratio of the fixed pier is much larger than that of a movable pier, and the earthquake force at the bottom is much large than that of a movable pier, which implies that much attention should be paid to the design of a fixed column.

Key words： single -column girder bridge shake table test seismic design experimental phenomenon seismic response hysteretic curve strain distribution

收稿日期: 2018-03-20 出版日期: 2019-08-15

引用本文:

邵长江1,2，漆启明1，韦旺1，胡晨旭1，王猛1，肖来川1，肖正豪1. 独柱墩简支梁桥抗震性能的振动台试验研究[J]. 振动与冲击, 2019, 38(16): 49-55.
SHAO Changjiang1,2,QI Qiming1,WEI Wang1,HU Chenxu1,WANG Meng1, XIAO Laichuan1,XIAO Zhenghao1. Shaking table test of seismic performance of a simply-supported girder bridge with single column. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(16): 49-55.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I16/49

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